[BAA Comets] ATel: *possible* fragmentation of 29P

[Richard Miles]

P.S. Inner coma processing showing structure in the outflow of material from 
the nucleus as of Sep 28.46 in the attached.
Richard Miles


----- Original Message ----- 
From: "Richard Miles" <rmiles.btee at btinternet.com>
To: "BAA Comets discussion list" <comets-disc at lists.britastro.org>
Sent: Thursday, October 03, 2019 11:11 PM
Subject: Re: [BAA Comets] ATel: *possible* fragmentation of 29P


> Here's a report from the BAA Observing Campaign on 29P.
>
> High cadence photometry shows that here have been 3 recent mini-outbursts.
> They occurred on:
>
> 2019 Sep 12.14
> 2019 Sep 17.70
> 2019 Sep 27.67
>
> Dates are accurate to +/-0.20 days.
> The first event was strongest with the inner coma magnitude rising from
> 16.6R to 16.0R
> The second only changed from 16.2R to 16.0R
>
> I attach images taken on Sep 28.46 and Oct 03.65.
> The former is of particularly high resolution in sub-arcsecond seeing and
> one can clearly see a fan-shaped outflow extending eastwards some 3 arcsec
> and concentrated towards p.a. 70 deg, as reported by Kelley et al.in ATel
> #13164.
>
> We have seen similar slow-moving outflows on many occasions. Larger
> telescopes pick them up early on in their development but they can also be
> seen in images taken with smaller instruments provided that a large number
> of frames are stacked, such as shown in Jean-François Soulier's stack of 
> 60
> frames taken on Oct 01.1, also attached. You can see the development of 
> the
> fan structure in the eastwards direction.
>
> Richard Miles
> BAA
>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: 29P_20190928_F65_MilesR.jpg
Type: image/jpeg
Size: 241509 bytes
Desc: not available
URL: <http://lists.britastro.org/pipermail/comets-disc/attachments/20191003/ae79a21a/attachment.jpg>